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Chemistry Lecture 8 For General Chemistry and InOrganic Chemistry — Transcript

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0:01Okay, class. So, let's discuss chapter 8
0:04chemical equations.
0:06Okay, decision is now recorded.
0:13So, chemical equations, no? Uh, shows us
0:17what would be the who are the reactants
0:20and what would be the products.
0:24So yung equation no may normally
0:27pinapakita ano yung mga compounds and
0:30their state no tapos ano yung magiging
0:34ah products tapos ano yung naging
0:37process no ano yung ah type of reaction
0:41no doun sa isang chemical equation kung
0:43may energy ba na na-absorb or na-emit or
0:48na release no pinapakita rin sa isang
0:51chemical equation Okay ayan. So
0:56okay in this picture no. So pinapakita
1:00rito, no? There are flames and sparks no
1:05result when aluminum foil is dropped to
1:09a liquid bromine, no? So it's a chemical
1:12reaction no.
1:15Ayan.
1:18So chapter outline. So we have here we
1:22discuss
1:24chemical equation
1:26writing and balancing chemical equation.
1:30Teka who among you have already tried no
1:33balancing equation during their high
1:35school no? So I I believe lahat kayo no?
1:39So nakapag-balancing equation kayo.
1:41Tama. Okay. So naalala yung nilalagyan
1:44ng coefficient no para maging multiplier
1:47no ganun siya. Now we would also tackle
1:51why no do chemical reactions occur and
1:55the type of chemical equations
1:58then of course heat in chemical chemical
2:01reactions no then uh another important
2:05topic that we should discuss no last but
2:09not the least no about climate change.
2:13Teka, chemistry to ah. Bakit parang
2:16environmental science no? Yun bang
2:19nangyayari sa kapaligiran natin ay
2:21chemistry din?
2:25Agree ba kayo yung nangyayari sa
2:26environment chemistry?
2:29Ah yes no? So kasi yung paligid natin
2:33it's made of chemicals. So therefore um
2:38even the flooding no there's chemistry
2:40behind it. Okay? So let's uh discuss yun
2:43mamaya no. Ayan. So ito pa no. Ayan. So
2:48sige
2:508.1 no'no chemical equation no? Teka
2:55ilabas ko na lahat ng ano nakatagong
2:57words. Okay so nakalagay diyan short
3:01hand notation for chemical change or
3:04reaction. So it's a
3:08way no to show no in a shortened manner
3:13ano yung nangyari sa isang particular
3:15reaction. So ito example niya class. I
3:18would circle it in green. Ayan.
3:23Okay.
3:25Summarize chemical reaction by
3:28displaying the substance reacting and
3:30forming on this side.
3:33Teka.
3:35sa left no sa perspective niyo habang
3:38nanonood kayo sa screen na to no sa left
3:41itong may arrow na green these are the
3:45react
3:48tsaka
3:50baguhin ko yung kulay dapat red yung
3:52kabila kung green ba yung yan dito naman
3:56okay with the red arrow these are the
3:59pra
4:02product products
4:03Okay
4:05ayan. So ang ah nagdi-divide sa kanila
4:09no iyung reactants and the products is
4:11yung arrow sa gitna.
4:15Ah na-recall 'di ba? Anong ibig sabihin
4:19ng arrow? Ang ibig sabihin ng arrow yung
4:22reactance daw ay magiging
4:25product or ito no. Now minsan okay yung
4:31arrow natin hindi siya isang direksyon
4:34lang
4:36o minsan yung arrow natin anong itsura
4:39may isang nakatutok d sa kabila yung isa
4:42naman nakatutok sa pabalik
4:46ba so anong ibig sabihin ng ganitong
4:48arrow
4:51yan
4:54what's the meaning of
5:00Oh,
5:03clue no it should start with letter R.
5:10Yon. Hindi repeating eh nice try to.
5:14Nice try. Sige bigyan ko ng points to.
5:15Nice try.
5:17Santos Chris Martin. Okay. Ang tamang
5:19sagot is
5:22ano yung sinabi ni Miss Miuki no? Surok
5:26ka. Ayan. So it's reversible. Ibig
5:30sabihin
5:31pagka ang reaction natin ay reversible
5:36no yung reactants
5:39magfo-form siya ng product pero yung
5:43product pwede siyang bumalik into
5:46reactants no may mga ganong klase ng
5:49reaction no ah that follows no they
5:53follow equilibrium
5:58kung minsan kasi Kasi kung ilan yung
6:00reactance,
6:02kung halimbawa two yung reactance, dapat
6:04two rin yung equating value ng products,
6:08no? Yan lalo na kung may ganitong
6:10symbol, may reversible symbol, no? Or
6:15otherwise may hinihingi siyang condition
6:17para maging reversible, no? So in a
6:22chemical equation, the atoms must be
6:25balanced
6:27maintained in all chemical
6:29All atoms from the reactants must appear
6:32as part of the product. So teka ano bang
6:35ibig sabihin nito? Kung ilan yung atoms
6:39teka kung ilan yung atoms
6:42sa ating reactants ganun din daw dapat
6:46karami yung atoms sa ating product.
6:51Okay? Gets? So dapat
6:55balance no? Ayan. And also kung sino
6:58lang yung mga elements na nandito sa
7:00product, yun lang din yung mga elements
7:03na meron sa ay sorry yung elements na
7:06meron sa reactant. Yun lang din dapat
7:08ang meron na element sa product. So
7:11dapat same lang din ang character, same
7:13ng dami, no? Ayun.
7:17Okay.
7:19Ayan. So, how do we uh write it? So,
7:23here's the general uh structure.
7:27Ayan. So, pinapakita anong ibig sabihin
7:30nung mas maliit
7:32na letter dito?
7:35Sige nga. Sa nakakaalala nung high
7:38school nila, anong ibig sabihin nung mas
7:39maliit na letter na yan, ano ang
7:42equivalent niyan? O, nandiyan na 'yung
7:45word.
7:47Correct. Ito si Miss Hstatpat'o.
7:54Those ito no'no teka are coefficient.
8:05Ibig sabihin
8:07kung may number two ako dito no. Lahat
8:11na nakasulat sa a is multiplicable by 2.
8:18Pero okay, if our coefficient is 1, do
8:23we need to write it? Kapag one lang
8:26naman.
8:29Sabi diyan hindi na. No need no? No need
8:33for you to write no. Okay. Ayun. So
8:39ganun ano?
8:42Okay. Sige move tayo.
8:47Now uh information about the reaction
8:50such as temperature and time may be
8:54placed above or below the reaction
8:57arrow.
8:59If there is a triangular symbol, ayan
9:02may delta symbol tayo. This shows ayan
9:06ito na pala heat no? Ayan may heat daw
9:11kapag may triangular. So meaning to say
9:14no without heat this particular reaction
9:19will not proceed or it may proceed
9:23however without heat it would be slow
9:27' ba. Okay. Ayun.
9:34Then another no uh sa isang chemical
9:39equation we can also write the physical
9:41state of the matter ba kung S
9:46it means solid if it is L
9:51liquid G g g g gas
9:56okay what if AQ no that's Aquus ano ba
10:01ibig sabihin na aquus
10:03The compound is um
10:07mixed no or in solution form no. Okay.
10:14Ayun. So pwedeng ganon ano nakahalo sa
10:17water or it's solvent. Okay.
10:22Ayun. Dissolve in water no? Pwede
10:26nakahalo sa tubig kaya aquus.
10:30Okay.
10:35Ayan. So ayan po yung mga symbolism.
10:39Kita
10:42yung AQ class hindi lang water ang
10:45pwedeng pag-dissolvan ha. Depende kung
10:47anong ah competent na solvent or um what
10:53you call this no? Compatible na solvent
10:57ang ano no. Pwede siyang aquous pa rin
10:59siya. Ayan. So ito po 'yung mga
11:03symbolism. Okay.
11:07Law of conservation of mass. So ano ba
11:11ibig sabihin ng law of conservation of
11:13mass?
11:15Ayan. Anong napansin niyo class dito?
11:18100 grams
11:21ang ating reactants, no?
11:25So dapat yung amount ng product
11:30anong meron? Dapat equal.
11:33Gets niyo?
11:35O payag ba kayo class? Ganito halimbawa
11:38mag-deposit kayo ng pera sa bangko.
11:41Naglagay ka sa bangko no? Ah 10,000
11:47pes no sa bank.
11:52Nung napasok mo na sa bangko.
11:55Aba eh naging
11:571k na lang. Okay. [tawanan][sumisinghap]
12:00Oh. O, inside na 'to. Inside. Pwede ba
12:04'yun? Okay ba sa inyo yun? Agree kayo.
12:06Okay lang.
12:08Okay lang sa inyo no?
12:12Sino? Sino payag? [tawanan]
12:15Oh, masamang bangko 'to ano?
12:18Okay. Pangit na bangko 'to. [tawanan]
12:22Hindi maganda. Okay. So dapat equal 'di
12:25ba kung ang kung ang pinasok mo 10,000
12:28dapat ang makikita mo don sa application
12:30or sa sa
12:33kung may gumagamit pa ano 'yung
12:34tinatawag na
12:37ba 'yun pass ba 'yun? 'Yung sa bangko
12:41[tawanan][sumisinghap] yung parang
12:42booklet na nandun yung amount.
12:45So dapat equal 'di ba? Hindi naman
12:47pwedeng hindi no.
12:50O
12:51lahat tayo no may konsepto ng dapat
12:54patas at equal. Napansin niyo ayan kahit
12:58nga sa ano eh, kahit nga sa grade
13:01papayag ba kayo? Ang score niyo sa exam
13:04100
13:06ang exam score niyo pero ang lalabas na
13:09final grade ninyo. Aba eh singko.
13:13Pwede ba 'yun?
13:16Okay. So hindi rin pwede 'di ba?
13:21O no? So lahat tayo may concept nga no
13:25ng ah
13:27equal dapat no. So dito sa law of
13:30conservation of mass kung ano ang
13:32binigay
13:33yun din ang kapalit.
13:37Okay? Equivalent exchange no? Ayun.
13:43Okay. Now, in any chemical reaction,
13:47mass of reactants should always be equal
13:52with the mass of product. Tandaan to ha.
13:57Okay. Tandaan po ito ngayon eh. Sir
14:01bakit ganun? Nung yung papel halimbawa
14:04yung papel no?
14:07So meron kang paper
14:10tapos sinunog mo. So ang meron ka na
14:13ngayon ano na yung charred na no or
14:17burned.
14:19O tinimbang mo to for example tinimbang
14:21mo 50 grams nung sinunog mo inapuyan mo
14:26eh lumalabas 10 grams na lang.
14:30O, so ibig sabihin na-break na natin
14:32yung law of conservation of mass. Hindi
14:34na totoo to.
14:36Saan napunta yung ibang timbang nito?
14:38Saan napunta?
14:40Oh
14:45oh oh 'di ba? Saan napunta? Tingin niyo
14:49o yung papel daw na sinunog. saan
14:50napunta 'yung ibang timbang non. So
14:52'yung iba ah pwedeng hindi mo na kasi
14:55maka-quantify dahil ah 'yung iba
14:57nag-escape na no'no sa atmosphere. So
15:00yung iba naging ah gasous. Teka ba't
15:04parang nag-log na 'to.
15:10Ayan. So yung iba naging ano nawala ako
15:12clas na nag-log ako no.
15:16Okay. Naging gas yung iba no? Escape
15:21yan. Tumakas no. Yan. So imposible na
15:24siya na matimbang mo no. Naging smoke
15:27ito. It to
15:29or naging air or naging part ng air no?
15:35Ah naging gas. O gas din yung sagot
15:37niya. Ayan no. Okay.
15:42So hindi siya pwedeng ma-break no. Ayan.
15:45Now, writing and balan balancing
15:47chemical equation. Ayan. So, general
15:50method. Ayan, pinapaliwanag papaano ba
15:53yung tamang methodology no?
15:57Identify the reaction. That's number
15:59one. Write the unbalance or the skeleton
16:02equation. No,
16:06and then write the correct formula for
16:07each substance.
16:10And the number three, you have to
16:12balance it. Okay? Ah class, ito. Naalala
16:16niyo ba
16:18ang tinuturo sa atin?
16:21Lahat daw ng elements ililinya mo muna.
16:25Ayan. Ihahanay mo muna 'di ba? Tapos
16:30bibilangin mo no? For example ito one 1
16:352.
16:39Okay? So ang hindi balance diyan ta's
16:41magsisimula ka sa hindi balance no? Ang
16:44hindi balance dito is oxygen.
16:48So ang tendency maglalagay po tayo dito
16:50ng value ba lalagyan ko ng number two.
16:54Ayan.
16:55So lahat ng character teka
17:00na nandito
17:01yan yung may itim na underline. Okay
17:04lahat sila times 2. So ibig sabihin
17:07itong 1 dito times 2.
17:10Yung number yung oxygen dito times 2. So
17:13you would have two. You would have two.
17:17However,
17:18balance na yung oxygen mo. Okay na.
17:21Lagyan na natin ng check.
17:23Hindi balance ngayon yung ito itong HG
17:26no Mercury.
17:29Ayan. So lalagay ako ngayon ng number
17:31two dito. Ayan. Para ito magm-multiply
17:36by 2. You would have two. Now ah lahat
17:39sila no balance na no. Lagyan natin ng
17:43check. Yan. So ganun yung ginagawa natin
17:46ano in our high school no? Balancing
17:49equation.
17:51Ayan.
17:52Okay. So ganun pa rin ba ang method?
17:55Ayun. So ganun pa rin no? Yun pa rin
17:56yung same way of doing it. Okay. Ayan.
18:02So pinakita.
18:04Ayan.
18:07Ayan. Pinakita lang no yung ginawa
18:08natin.
18:10General method no for writing and
18:13balancing equation.
18:15Yan.
18:19Okay
18:24yan. Now,
18:26uh what if 'no? Ito 'yung nailagay mo.
18:31Ayan.
18:32So you would notice yung uh 4
18:372 they are all divisible
18:40by
18:42o ano yung pwede pwede mo sila i-divide
18:44by
18:462 ' ba napansin
18:49pwede niyo sila i-divide by two sin
18:51unang nakasagot yan si Miss ah Lucilla
18:55no
18:57ah Hepsane no
19:01ayan Yan. Okay. So lahat sila pwedeng
19:04i-divide by 2. So therefore, this can be
19:08what we call
19:11simplify,
19:13no? Pwede pang i-simplify, pwede pang
19:16ibabaan
19:18no. Ayan. Para makuha mo yung tamang
19:22form, no? Ayan. So may mga ganun kasing
19:25cases eh. May mga ganong stance no?
19:29Okay.
19:31Ah ito ano balancing equation practice
19:33number one. O write a word equation
19:38for the reaction. Magnesium plus oxygen.
19:40Magnesium oxide. Ayan. So nilagay na
19:43yyung unbalanced
19:45then balance the equation. Ayan pinakita
19:47papaano.
19:50Okay.
19:53Ayan
19:55oh.
19:58Ayan pinakita no papaano siya
20:00iba-balance
20:02yan. So maglalagay na lang ng number two
20:04dito banda no. Teka
20:08ayan number two dito no para ma-balance
20:11siya. Sige skip ko na to class ha. Ano
20:14na to eh very elementary no?
20:19Okay.
20:21Ah papaano naman daw if it is a
20:22decomposition
20:24ah equation. So ganun pa rin. The rules
20:27won't change. No
20:29you will still have to count all no the
20:33atoms of each element. Yan bibilangin mo
20:37pa rin siya.
20:40And then inspect saan mo pwedeng baguhin
20:43or saan ka maglalagay ng coefficient no?
20:47Ganun pa rin.
20:55Okay. Ah
20:57in this case daw oxygen needs balancing
20:59on both sides.
21:01O kasi ang nakalagay dito you have three
21:05and you have two.
21:07So think of it no? Ano iyung common
21:10multiple nila
21:12so they can meet no with anong value?
21:17Six. [sumisingasing] Tama. So pwede
21:20silang magkita sa six. So what you need
21:22to do is to multiply this
21:25by 2
21:27para ito maging
21:296.
21:31Ito naman you can multiply this by 3
21:34para maging 6. No. O however ah hindi na
21:38siya magiging balance with K and with
21:41potassium and chlorine. So therefore no
21:44on this side para mag-balance siya
21:47lagyan mo ng two dito no. Yan that way
21:50magiging balance na siya. Okay po ba?
21:53Ayan so ganun lang no? Ganun lang naman
21:56yung logic niya. Sige move na natin ah
22:01kung tama tayo ng sagot. Ayan.
22:06Teka. Ayan. So the lowest common
22:10multiple no of 2 and 3 is 6. No sino
22:15Sino yung nakakuha ng tamang sagot na
22:17una? Ang unang nakakuha ng tamang sagot
22:20si Miss ah Kusy. No ayan.
22:26Paano ba to? Kstin.
22:29Tama ba? Kirstein ba? Yan talaga yung
22:31spelling ng name mo? Yes po sir. Ah
22:33Christine po. Christine. Okay.
22:37Parang ano no yung bansa Kazakhstans
22:40ganon. Okay.
22:42Walang ano walang walang anong tawag
22:44dito? Vowels.
22:45>> Wala pong vowels.
22:47>> Ah talaga? Galing ah. Opo. Kasalanan po
22:49ng mama ko po. Joke.
22:51>> Oo. Walang bawal yung keyboard no joke
22:55lang ha.
22:57Ang galing no? Okay.
23:02Ako pag nagkaanak ako, ito pangalan eh.
23:04Yan.
23:08Ayan. Ganyan. The joke lang [tawanan]
23:13baka ano.
23:17Okay. Ayan. So mabalik tayo no. Pag
23:21nilagyan natin ng number two dito. Yan.
23:23So multiply by 2 no.
23:28Ayan. So ayan. So magiging ano na siya
23:31ah balance na po siya no? Ayan. Kita po.
23:41Ayan, pinakita na. Yan na po yung
23:43balance, no? So, you do the you do the
23:45final check to make sure all atoms are
23:48now equal on both sides, no? The
23:51reactants and the products. Okay.
23:57Ayan. Okay. Now,
24:01write the balance equation for the
24:03reaction of silver nitrate and hydrogen
24:06sulfide to produce silver sulphide and
24:10nitric acid. Okay. Yan na pinakita. So
24:14mas mahabang equation na ngayon 'to ano?
24:16Okay.
24:21Ah sige nga class. How would you balance
24:23this?
24:25Oh
24:28yung ah coefficient na lang ilagay niyo
24:31yung pagkakasunod-sunod.
24:33Halimbawa ganito.
24:352 1 2 2 for example no?
24:42O sige nga.
24:44Can you balance this on your own?
24:49Silver,
24:51nitrogen, oxygen, hydrogen,
24:55sulfur no silver,
24:58nitrogen, oxygen, hydrogen, sulfur.
25:03Okay. So ilan ang ano natin? Silver. 1
25:103 2
25:131 no
25:152
25:191 3
25:221
25:24Tama ba? Tapos one.
25:28Okay. So, saan tayo unang dapat
25:30mag-balance? No, mag-try mag-balance.
25:33Sige.
25:34Okay. Lalagyan ko siguro 'to ng number
25:36two, no? Ayan.
25:39Therefore,
25:42so ito'y multiplicable by 2.
25:52Ito naman magiging ah six, no?
25:57Ayan. Tapos
26:00okay so balance na yung ating ano
26:02balance na yung ating silver no. Ah
26:06siguro maglagay ako ng two dito no. Yan
26:10para
26:12ma-multiply ko 'to by 2.
26:15Multiply to by 2.
26:17Multiply by 2. 6. No yan. So inspect
26:23natin. Baka naman balance na no.
26:272112
26:28ang tamang sagot no so ang unang
26:30nakakuha miss Lucilla no yan okay o
26:34count na natin yung iba sayang naman
26:38ayan na
26:40ayan okay
26:44so dito no
26:46ayan napansin
26:49so balance na sila no two silver two
26:54nitrogen 2 6 oxygen 6 oxygen
27:002 hydrogen 2 hydrogen 1 sulfur one
27:04sulfur so ibig sabihin
27:07pwede na natin siyang bigyan ng isang
27:11okay malaking check no parang Nike yan
27:15ganyan okay
27:19okay po nakuha papaano ganun lang naman
27:22ba ang balancing equation No.
27:27Ayan.
27:29Okay.
27:30Ay sige sige malagay mo lang diyan ma.
27:34Doun na lang muna. Oo.
27:37Ayan. Okay.
27:43So ayan
27:46i-move ko na class ha. Nagawa naman na
27:49natin ano.
27:51Ayan. So yan na yung ano final na ah
27:54balance equation no? Okay.
27:59O sige nga. Practice
28:02balancing chemical equation. Practice
28:04number four. O anong sagot niyo? Mmm.
28:16Ayan. So ang sabi dito, write the
28:19balance equation uh for the combustion
28:22of butane no.
28:26Okay. So ang butane daw is C4H10
28:29gas.
28:32Okay? Where carbon dioxide and water are
28:36the only products.
28:40Okay. Teka. Ang isang combustion kasi
28:45para mag-combust 'no? It requires
28:51oxygen no'. Yan.
28:54So ibig sabihin ah hindi lang itong
28:58character na 'to ano
29:01ang required. So kasali rin sa equation
29:04no yung presence ng oxygen. Plus ah tip
29:07no para madali
29:10ah hindi na kayo mag-balance no ng
29:12isa-isa.
29:14Inspect niyo yung mga choices
29:17yan. Inspect niyo 'yung mga choices
29:20kung sino sa kanila ang
29:23balance na. Okay
29:27yan. Inspect niyo yung mga choices if
29:29they appear to be balance. Tingnan niyo
29:32'to last
29:35para mabilis ha. Ito iyung technique.
29:39C4
29:42C.
29:44So ibig sabihin ito ay out
29:49C4
29:524C ' ba? Okay. So pwede pasado siya
29:54doon. 10
29:5810 din. Okay pasado siya.
30:02Okay.
30:04However, meron siyang 10 na oxygen
30:10no?
30:12Tapos dito
30:14ano ba meron siya? Ah meron siyang um
30:18eight
30:20tapos dito meron siyang five. So parang
30:23sobra
30:25no? Okay. So hindi siya possible no?
30:30Hindi na siya kasali agad.
30:32'Di ba? Tingnan niyo. Tapos ito no.
30:35Tingnan niyo mabuti. C4.
30:38Ayan.
30:40Tapos ah 6.5. So ito ay 13. Ang total ng
30:45oxygen dito meron kang 8.
30:49Dito meron kang five. Teka
30:52o. Balanse ba siya? Tingnan niyo mabuti.
30:54So pwede kayong mag-ano ha. Pwede kayong
30:56mag-inspect na lang instead of doing the
30:59whole balancing procedure. So pag ganito
31:03'yung ano ha, ganito 'yung given type of
31:05question, pwede kayong mag ah inspect ng
31:09mga choices, no? Ayun.
31:14So, nakapag-eliminate tayo no? Ang
31:16na-eliminate natin is ito at saka ito,
31:19no? So, sila yung mga hindi na agad ah
31:22feasible, no'. Ayan. So tingnan nga
31:25natin. So the answer is ah C no. Ayan.
31:30Okay.
31:33Ayan. So butane plus oxygen is equals to
31:36carbon dioxide plus water. No the
31:40correct answer is C. So ibig sabihin you
31:42need 2 moles of butane 13 moles of
31:47oxygen, 8 moles would result no to 8
31:50moles of um carbon dioxide and 10 moles
31:54of water no? Ayan.
32:01Okay. Ayan
32:05o. Balancing equation.
32:10Ayan. So pinakita yan
32:15um atoms balance but all coefficient
32:20must be whole number. Teka napansin niyo
32:24ba yung isang choice
32:26no? Itong d
32:29plus
32:32ah balance siya no? Okay siya. Okay.
32:35However, no ah yung sinasabi dito no,
32:41this should be whole.
32:45Okay? May decimal kasi no yan yung isang
32:48naging ah reason kung bakit ah hindi
32:51natin siya pinili no.
32:55Ayan. Oo tama no. atoms
33:00balance but all coefficient must be
33:03whole number.
33:06Ay nandiyan na naman yung pusa ko no.
33:09Okay
33:13ayan ah sige ito problem number five.
33:17Sige nga try tayo. Try plus teka lang
33:20sige before you try.
33:22What if nakakita kayo ng open and close
33:26parenthesis? Ano po ang ibig sabihin?
33:31Okay, correct po ito. Lagyan ko ng ano
33:33ha points ong mga to. Yung sinabi ni
33:36Leida and
33:39Villasis. Dapat whole number yan. O sige
33:43mabalik tayo dito. Anong ibig sabihin ng
33:45open and close parentheses? Bakit may
33:47ganyan?
33:49' Ba sa algebra. Ayun. Correct. Ito ay
33:53magdistribution
33:56or idi-distribute
33:58no'yan yung amount po and amount po ng
34:01atoms for the compound. Okay? Ayan.
34:05So yung number two sa labas would
34:09multiply what's inside. Okay, same goes
34:14with this. So be careful when counting
34:18no when counting um atoms no especially
34:24kung may ganito, may open and close
34:25parentheses. Marami pong nalilito sa
34:27ganyan. Okay?
34:30O sige inspect tayo. Sino ba ang mga
34:32candidate natin? Tingnan muna natin yung
34:35magnesium. O kasi yun yung metal eh.
34:38'Yun yung least na pwedeng ma-repeat no.
34:43Okay. Tingnan niyo. Ilang magnesium ang
34:44meron dito? Isa. Dito tatlo. Somatic ito
34:50ay eliminated. Okay.
34:55O tingin ulit.
34:57Meron pa bang um hindi tatlo ang
35:01magnesium? Wala na. Maliban sa kanya no.
35:04Kay B.
35:06Okay. So lahat sila tatlo ang magnesium.
35:11Okay. So saan pa tayo titingin? Okay.
35:14Tingin tayo. Ayan.
35:17O yung number ng ano number ng hydrogen.
35:22Okay. Tingin tayo sa number ng hydrogen.
35:25Ay sorry sorry ano pala phosporus muna.
35:28Ayan.
35:31So dito may dalawa kang phosporus.
35:35Okay. Dito dalawa din. So pasok pa siya.
35:40O dito ilan? Ayan.
35:44So may dalawa kang phosporus
35:48dito. Dalawa.
35:51Okay? Dito.
35:54Ayan. Tingnan niyo 'to. Ilang phosphorus
35:56yung meron ka?
35:59Isa. Dito
36:03dalawa. So tama ba? Eliminated ba ang C?
36:07Okay. Eliminated yung C.
36:11Okay. Yes. Correct no? Eliminated. Ayan.
36:14O. So ang feible choice na lang natin is
36:16A and D. Napansin.
36:20Okay. So anong sagot niyo? Ayan na. May
36:22sumagot ng letter
36:25D. Okay. D 'yung correct na answer 'no?
36:28Bakit? Tingnan nga natin
36:32o. Hindi lang dahil nakita na sa slides
36:34ha. Baka mamaya [tawanan]
36:35'yun 'yung reason niyo ha. Okay.
36:38Pinapaliwanag natin papaano magano ha,
36:40mag-eliminate. Okay. Ayan. So ang tamang
36:44sagot is letter D. Ayan po.
36:51Okay. Ito yung reaction niya. Skeleton.
36:54Ayan pinakita.
36:55Ah papaano siya na-balance?
36:58Ayan.
37:00Okay.
37:06Tama ba? Yan na ba yung balance niya?
37:08Coefficient.
37:11Okay. Write the balance equation. Teka
37:13binabasa ko ha. Balance equation. Ayan
37:15na.
37:20Okay. Teka.
37:23Okay. So dapat daw maglagay ng Okay. To
37:26balance water add coefficient of 6. Dito
37:29daw. Ayan six.
37:33Okay. So magiging ano na to 6. So ito ay
37:3712 6.
37:40So in this format no balance na siya.
37:43Ito po yung tamang sagot no. Ayan na.
37:47Okay.
37:52Okay.
37:58Information in a chemical equation, no?
38:01Ayan. So ano yung mga pwede mong malaman
38:04sa isang chemical equation? So sa
38:06chemical equation po ah bukod sa
38:08pinapakita niya yung formula, pwede rin
38:12niyang sabihin no ah ilang atoms ang
38:15meron tayo. Yan ito no yung information
38:19and ilang mole okay nitong nitong
38:24molecule na to. So for example in this
38:27equation sinasabi that we have 5 moles
38:32of this oxygen, 3 moles of carbon
38:36dioxide
38:384 moles of water. No pinapakita ah saan
38:42nanggaling yung yung mole no na value
38:46yung number po ng coefficient that's
38:48equivalent to mole.
38:51Okay. Then
38:53ano pa no? Ah pinapakita rin yung ating
38:59ah atomic weight or molecular weight.
39:04Ayan pinapakita.
39:06Okay. Ito ano yung 32 for oxygen, 44 for
39:10carbon dioxide, 18 for water. Eh ano ong
39:15may value pa sa ilalim? Yan yung ah
39:19total weight kung imu-multiply niyo pa
39:21sa number of mole, no? Ayan.
39:25kita. Okay.
39:35Mm.
39:37Okay. Ayan. So pinapaliwanag to.
39:40Information from chemical equation.
39:42Ayan. O sige nga. Bagong tanong. Bago
39:45na. Okay. From the chemical equation
39:48below, how many molecules of oxygen are
39:53needed to burn
39:55uh two molecules of propane? O ilan daw?
40:05Oh,
40:07anong sagot niyo? Ah, okay. Kung ito ba
40:10ay dalawa.
40:13So dalawa daw nito. Dalawa ilang ganito
40:16no? So ang tamang sagot po sino sino
40:18nakauna?
40:20Okay. Ang unang nakasagot ito. Pili ako
40:22ng tatlo. Lucila,
40:27si Miss
40:29Velasco, Ika no? At saka si ano JLN May.
40:35Ayan
40:37Martinez no. Ayan. So,
40:41okay
40:43ah kung dadalahin ko 'to dapat 10 ito no
40:47ganun dapat.
40:49Okay. Ayan
40:52kita.
40:55Okay.
41:02Ito na. Uh why do chemical reactions
41:06occur no? There are driving forces that
41:09indicates reactants will change into
41:11product. Okay? Ano yung mga pwedeng
41:14dahilan? No
41:18okay formation of solid. If it is
41:22feasible to form solids, gas, water,
41:28transfer of electrons. These are the
41:30driving force.
41:33predicting a chemical reaction. No, to
41:37predict a reaction will occurriving
41:42force na yung mga nabanggit kanina no?
41:45And plus ha, there are other driving
41:48force aside from those haba.
41:53Okay? Ayan.
41:56So, what are the types of chemical
41:58reaction? Ito
42:01teka.
42:02Ayan. So ito po yung mga types ng
42:04chemical reaction.
42:10Ay mali yung pagkaka-box ko. Ayan na.
42:12Ayan na. Five major category. May
42:17tinatawag po tayong combination.
42:20Saagalog po ay pinagsama.
42:24Ah decomposition.
42:28Pinaghiwalay.
42:31Single displacement. Anong ibig sabihin
42:33ng single displacement?
42:36Oh, pinalitan yung isang component ' ba?
42:42Ah, for example, AB
42:46+ C
42:50o naging ano? Naging AC + B.
42:54So
42:56teka
42:59kita. Okay. Yung yung instead na yung
43:02partner ni A is B, naging partner ni A
43:07si C 'di ba? O normally makikita niyo
43:12yan sa mga artista na joke ko lang.
43:15[tawanan] Single displacement.
43:18Okay no?
43:22Ayan. Tapos may tinatawag tayong double
43:25displacement. So ibig sabihin nagpalitan
43:28no? Dalawa yung pinalitan.
43:30Tapos meron tayong umidation
43:34reduction. So kung maalala niyo may
43:37tinatawag tayong Je
43:40ROA
43:42and Leama
43:46ba? Leora.
43:48Ano ba yon? Ang oxidation kasi and
43:52reduction ay coupled no na klase ng
43:55reaction. Agag may oxidation dapat
43:58merong reduction. So kung may magge-gain
44:02ng electron, ang tawag sa proseso na yon
44:05is no reduction.
44:09Kung may maglo-loose ng electron
44:12oxidation. Kung may nag-gain kasi dapat
44:15may nag-loose ba.
44:17Kung may nagkaroon merong mawawalan no.
44:21Ayun. So ito po yung mga klase ng
44:23chemical equations or chemical
44:27reactions. No ayan. So start with
44:29combination. Example ng combination.
44:34Yan. So pinagsama no in this case
44:40okay sodium to sodium.
44:44Okay. Then chlorine gas.
44:47You would form two sodium chloride salt,
44:54calcium oxide water. So you would form
44:59no calcium hydroxide
45:03no which is a metal hydroxide.
45:06Okay? Iyung solid and liquid meron na
45:09tayong tinatawag na aquus no.
45:13Ayan. Then aluminum solid no and bromine
45:18liquid. So we form aluminum
45:22bromide. Okay?
45:29What about decomposition? Ayan. So
45:31decomposition pinaghiwalay
45:34no. Ayan so ito 'yung mga example.
45:39mapapansin ninyo from
45:43no to its reduced form or decomposed
45:49form no yan calcium carbonate calcium
45:54oxide and carbon dioxide
46:00hydrogen peroxide water and oxyg
46:04napansin no so pinaghiwalay
46:07No
46:10yan single displacement. Ayan. So yung
46:13example kanina no pinalitan ng pares.
46:18Ayan. So okay
46:22ito example natin. Real life example no?
46:26Ayan. Real concept. Hindi na letters
46:28lang.
46:29Zinc metal. Nilagayan natin ng
46:32hydrochloric acid.
46:35So we would notice it would form no zinc
46:38chloride and
46:41um
46:42hydrogen gas. Okay.
46:48Ayan.
46:52Reactivity of uh elements no. So may
46:59reason ba kung bakit merong reactive at
47:01merong ah less reactive? May priority,
47:05may least priority no? Meron bang ganon?
47:09Okay. So punta tayo sa kasunod na slide
47:12no. Ito plus ito yung tinatawag nating
47:15activity series no. Ayan so sino ba ang
47:19mas priority? No. Ayan. For example, no,
47:26sa isang chemical reaction may
47:29iron tapos may sodium. So sino yung mas
47:34ipa-priority ng reaction? Is it sodium
47:38or iron? Sige nga tingan niyo nga yung
47:41trend. May trend yan e. May trend.
47:45Sino dapat ang mauna?
47:55Okay. So dapat ang mauna,
47:57okay? Sinong unang nagsabi? Ito tama si
48:00Miss Miranda, Mikaela, Francine, no?
48:04Ayan. So tama no? Dapat ang mauna po ay
48:08sodium kasi nga tignan niyo sa trend
48:10increasing activity.
48:13Okay. So
48:15nasa taas siya. Ito nasa
48:18baba no? Parang si Bilma lang pala yun
48:20ano? Nasa taas. Nasa baba. Ayun. So ito
48:24y mauuna no.
48:27Ayan.
48:31O sige nga. Example tayo. Example para
48:33ma-visualize natin. Okay.
48:38O
48:43where A and B are metals no? And A is
48:47more reactive.
48:49Sige.
48:52So dito pinapakita ano ito single
48:54displacement itong reaction na to.
49:00Okay. Ayan. Tapos
49:04o sige pinapakita pa rito no. Single
49:06displacement din to.
49:12Okay. Ito metal and halogen.
49:18Teka, parang wala siyang example ng
49:20reactivity series.
49:25Wait lang. Ayan. Ito na. Ito na. Ito na.
49:27reactivity series na to. Will a reaction
49:30occur between nickel and
49:34uh hydrochloric acid? Okay.
49:38Ayun. So
49:42layout na natin. Okay.
49:45So between nickel and the hydrochloric
49:48acid no
49:51there is a based on the reactivity
49:55series nickel is more reactive than
49:59hydrogen.
50:00Okay so balik nga tayo
50:03tignan natin kung talaga bang reactive
50:06yan. Asan ba si nickel no? So si nickel
50:11nandito.
50:13Okay.
50:14Parang hindi pinakita si hydrogen. Teka
50:16nga.
50:19Ayan.
50:21Wait lang.
50:24So ito no si nickel.
50:26Okay. Reactive than hydrogen. So
50:30reaction occur no'. Ayan. Now, ito naman
50:33example
50:36SN. Okay.
50:39Ayan. And aluminum. Tingnan natin ha.
50:42Ito yung dalawang character natin. Si SN
50:44and aluminum.
50:51So yung metal dito is yung alone ano C
50:55SN. Tapos yung aluminum chloride natin
50:58nakaause. So solution siya. Ayan.
51:03Tingnan natin kung ah sinong mas mauuna
51:06dapat si SN or si aluminum. Balik tayo
51:08doun sa chart.
51:10Ayan.
51:16Okay. Meron bang aluminum dito? Ayun.
51:18Aluminum. So ito yung ah higher no.
51:23Tapos ito yung SN. So ito yung priority.
51:28Ito yung least priority.
51:31Okay. Kita
51:34so ibig sabihin no kung ito ay nasa
51:36aquiuse form siya yung nasa solution na
51:40hindi siya pwedeng i-displace ni
51:43Sn.
51:45Okay?
51:47Ayun.
51:48Pero what if class si Sn yung nasa
51:52aquus?
51:53Pwede ba siyang i-displace ni aluminum?
51:57So the answer is yes. No? Ayun. So
52:01depende kung sino yung priority. Okay.
52:08Teka,
52:11nasan na tayo? Ayun. So
52:15in this case, teka teka teka. Ayan.
52:19So in this case, ayan no reaction would
52:22occur. Kahit ilagay mo si
52:26SN no na metal doun sa solution, there
52:30won't be any reaction because aluminum
52:33is more reactive
52:36or more prioritized than Sn. Unless
52:40baliktad yung situation ha. Umm
52:45iyung Sn yung nasa aquus form tapos si
52:47aluminum yung nasa labas as solid metal
52:51no so yun magkakaroon ng reaction
52:54magkakaroon ng displacement no ayun okay
53:03ayan so other example ayan iron and
53:07magnesium so
53:10ayan O
53:14ayan pinapakita si iron yung metal si
53:17magnesium yung nasa solution no ayan so
53:22no reaction no
53:27okay
53:30iron is less reactive than magnesium no
53:36ayan
53:40double displacement So papaano pag
53:42double displacement? Kanina ah single
53:44displacement pinapakita yung reactivity
53:47series. Sino yung mas mapa-prioritize?
53:49No, ito naman no double displacement
53:52reaction. So may pagpapalitan ng partner
53:55no. Ayan.
54:01Okay.
54:03Ayan po.
54:05So
54:07you would notice hydrochloric acid.
54:11yung OH
54:14no uh was switched no ayan with
54:19chlorine. So ang nangyari ah instead of
54:22sodium hydroxide we now have no sodium
54:26chloride and then um instead of
54:30hydrochloric acid ito we now have water
54:35and it produces it produces heat
54:41this reaction
54:44is exo
54:49thmic
54:51reaction. Bakit? Kasi it uh produce
54:55heat, no? Yun yung reason.
54:58Okay.
55:01So meron tayong ah ayan ito metal oxide
55:05plus acid. Ito kasi acid and base
55:09no? So itong reaction na to is
55:11neutralization.
55:13Ayan.
55:16So meron naman tayong metal oxide and
55:18acid. Ito 'yung mafo-form no'no.
55:21Yan. So again, another exothermic
55:24reaction. Both are double displacement
55:28palitan. No?
55:36Okay. Double displacement forming
55:38precipitates or gas. Ayan. So
55:43pareho silang aquus.
55:45You would notice that they would form
55:47one is
55:49solid the other would remain aquous.
55:56Ayan.
55:58Okay. Bas.
56:01Teka baka may ano pa l natin lahat ng
56:05slides. Ayan.
56:09Okay. Now another
56:12gas formation.
56:15Teka lang. Bakit parang ano 'to? Kaya
56:19type 'to?
56:21Sige, hayaan niyo lang. Hwag niyong
56:23i-disregard natin to class. Teka. Okay.
56:25Ah, gas formation. Okay. Ayan. So from
56:31liquid solid, okay, we were able to form
56:35gas, no? Ayan.
56:42Okay. And then uh gas can also form a
56:47secondary reaction after displacement,
56:50no? Ayan.
56:53So aside from this reaction, there is a
56:57secondary may follow up na reaction, no?
57:01Ayan. So ito daw
57:03ito daw component na to
57:07can further no decompose
57:10into water and carbon dioxide no
57:17so may kasunod siya na na reaction no
57:19chain
57:20reaction okay
57:24writing um reaction equation ayan so
57:28pinakita lang
57:31Acid base salt plus water.
57:37Okay.
57:42Ayan.
57:47So convert names no to formulas. Ayan
57:51K3PO4
57:53barium chloride. Ayan. So both compounds
57:56are ionic but not as acids or base.
57:59Reaction is likely a double
58:01displacement. Ayan.
58:06So ano to question siya no?
58:12Yan. So yung answer daw dito is letter
58:15C. Yun daw yung ano ah
58:19equation na pwedeng mangyari. Okay.
58:28Okay. So, pinapakita lang sa atin no.
58:30Ah, ayan.
58:34Okay.
58:40Ah, heat in chemical reactions. Ayan.
58:44So, what's the purpose of heat? No,
58:48ayan. So energy transfer and
58:50changes accompany any chemical reaction
58:54no? So one observable no form of energy
58:58is thermal. Yan na heat.
59:01Ayan. So if heat is released
59:05okay so nabanggit ko na kanina we call
59:07it exothermic reaction.
59:11If
59:12heat is being absorbed
59:14that's endermic
59:16reaction. So you would notice
59:19uh kapag exothermic 'yung joues or
59:23energy presented it is in the product.
59:29If uh
59:32endothermic naman yung heat or yung
59:35energy na pinapakita sa equation is no
59:39in the reactance. Ayan.
59:48So dito the quantity of heat
59:52produce during a chemical reaction.
59:56Okay?
59:57So 1 mole of carbon with 1 mole of
1:00:00oxygen provide 1 mole of carbon
1:00:03dioxide and 3 393 no kjol of heat. Ayan.
1:00:11So pag nag-multiply ba no yung itong mga
1:00:14to
1:00:16let's say we we multiply this tinasan
1:00:18natin yung value. Tataas din ba yung
1:00:20amount ng heat na pwede niyang
1:00:23i-produce? No so yun yung question natin
1:00:27na natin no.
1:00:30Okay. Ay naano ko, na-nex ko. Okay. When
1:00:34uh 4 moles of uh
1:00:38hydrogen no iodine ayan
1:00:42okay are produced.
1:00:46Okay. So kung apat kung 4 moles daw ito
1:00:49ano so kung ito daw ay 4
1:00:53so this should be doubled also. Tama
1:00:57yan. So times 2 rin to.
1:01:01So how many energy is needed to be
1:01:05absorbed?
1:01:06Okay. Is it the same? Hindi no? So ang
1:01:09magiging sagot dito no?
1:01:13Okay. This should be 25.2 kj of energy.
1:01:16Naging times 2 kasi times 2 rin yung
1:01:19product natin ' ba? 4 moles of. Ayan.
1:01:23Hi. Ayan.
1:01:27Okay. So pwedeng madoble yung uh energy
1:01:32kung doble din yung ano product and
1:01:35doble din yung reactance. So sumasabay
1:01:37po yung amount ng energy na pwedeng
1:01:40ma-absorb or pwedeng maproduce.
1:01:43Okay?
1:01:47Ayan.
1:01:49Okay. Heat as an energy transfer vehicle
1:01:53in nature. No. So
1:01:57ayan.
1:01:58Wait lang class ha. Teka
1:02:02may announcement. Okay na. So
1:02:04photosynthesis converts energy in the
1:02:07form of light from the sun into chemical
1:02:11energy
1:02:14through the bonds in glucose. Ayan.
1:02:20So photosynthesis is an endothermic
1:02:23reaction. No, it absorbs. Okay.
1:02:27Supplied by sunlight. It absorbs energy.
1:02:33Fossil fuels. So ito naman iba no.
1:02:37Example ng fossil fuels natin, we have
1:02:39petroleum, coal, natural gas, all
1:02:42release significant energy during
1:02:44combustions. Kung ito,
1:02:47kung yung photosynthesis it absorbs no
1:02:51endothermic.
1:02:53Wait lang class.
1:02:59Ayan.
1:03:01Okay.
1:03:03Kung yung photosynthesis
1:03:05it absorbs energy, no?
1:03:09Ito naman sa fossil fuel no it produces
1:03:13energy no? It emits energy upon
1:03:18combustion.
1:03:20Yan.
1:03:22However, they need what we call
1:03:25activation energy
1:03:27no to initiate chemical. reaction.
1:03:32Okay.
1:03:34Now, what is an activation energy? Ayan
1:03:37na. So, dito tayo. Ayan na.
1:03:42Okay. So,
1:03:44reactants o ano, they need no certain
1:03:50amount of energy to be reach
1:03:52[sumisingasing]
1:03:53for it to to proceed no with the
1:03:57reaction. Okay. Yan. So iyung amount of
1:04:00energy needed to initiate a chemical
1:04:03reaction. That's what we call the
1:04:05activation energy. Now,
1:04:09okay.
1:04:12Ayan. So dito napansin niyo class yung
1:04:15reactants mas mababa yung potential
1:04:17energy kaya sa product.
1:04:20So ibig sabihin
1:04:23ah yung energy dito is being absorbed.
1:04:26So this one is endo
1:04:32endothermic reaction no? Ayan.
1:04:40Ang paano pag exothermic? Pag exothermic
1:04:42naman, baliktad no'no. Uh 'yung
1:04:45reactance mo mas mataas 'yung energy
1:04:47kaysa sa product.
1:04:50So energy is being released. It is an
1:04:53exothermic reaction.
1:05:03Ayan. Okay.
1:05:05Last part na tayo. Class. Climate
1:05:08change. The greenhouse effect.
1:05:11Okay. So
1:05:13ito na. Last na to.
1:05:15Ano ba yung pinaka
1:05:17sikat no na greenhouse gas? Okay. Ayan.
1:05:23That we produce, that our society
1:05:25produce. Ayan. So ito no. O sige nga
1:05:28kayo.
1:05:29Bukod dito meron pa bang ibang gas na
1:05:32napo-produce tayo na harmful?
1:05:35Oh marami no? Ayan. carbon dioxide,
1:05:38methane, o marami pao
1:05:42oh eh ano 'yung mga activity na
1:05:44nagpo-produce ng carbon dioxide? Sige
1:05:47nga, magbigay nga kayo ng activity.
1:05:48human activity
1:05:55talking [tawanan]
1:05:58sa bagay oo pwede naman kasi whenever
1:06:01you
1:06:03whenever you open your mouth
1:06:07you ano eh you release carbon dioxide
1:06:11so para wala ng carbon dioxide we
1:06:13refrain from talking no sige I'll start
1:06:20oke lang. [tawanan][sumisinghap]
1:06:22Okay. So
1:06:25ayan, transportation, farming. Actually
1:06:30ah lahat naman ng ginagawa ng human
1:06:34human activity no there's carbon dioxide
1:06:38halos lahat no ah release no.
1:06:42However,
1:06:45yung amount kasi ng carbon dioxide sa
1:06:48atmosphere,
1:06:49it can be reduced, no? If we have a
1:06:55photosynthetic teka hindi na ako makapag
1:06:57ano, right? Teka ito. If we have
1:07:04organisms, ano ba iyung mga
1:07:06photosynthetic organisms?
1:07:08Um, plants no? Ayun, trees no yung mga
1:07:14ano pa ba?
1:07:16Um, mga halaman, puno, no? Tapos mga
1:07:21algegae no na kayang mag-photosynthesis.
1:07:24Ayan. So okay, correct po ito no. So we
1:07:28need those no to balance. Kung ilan yung
1:07:31napo-produce na carbon dioxide ng ating
1:07:33activity, dapat meron ding enough na
1:07:36trees to negate yung production natin ng
1:07:40carbon dioxide. However, since we are
1:07:43reducing, ayan tama yung sinabi nung
1:07:45isa.
1:07:47Okay. Ito si Miss Araw no we are doing
1:07:52deforestation. Nagtatanggal tayo ng
1:07:54puno. Ayan. So it's um
1:08:00affecting the balance, no? Ayan. Now ito
1:08:03ba ito bang climate change na to and the
1:08:06greenhouse effect? May effect to sa
1:08:10problema natin ngayon no? Yung tinatawag
1:08:12na fla
1:08:15flo teka kumpletuhin ko lang.
1:08:20FL
1:08:22Dod ding ding. Ayan ang bato. Yan na.
1:08:27Okay. So, may kinalaman ba ito sa
1:08:30flooding?
1:08:32O
1:08:34yes no? O bakit?
1:08:37Kasi with increase carbon dioxide yung
1:08:40global temperature, yung tinatawag na
1:08:42global warming no
1:08:46also increases
1:08:48no? Chain effect siya e. Pag
1:08:50nag-increase yun, global warming, yung
1:08:53mga tinatawag na polar ice cups,
1:08:58yung mga glaciers. Familyar ba kayo
1:09:00doon? Teka. Yung mga frozen
1:09:04parts
1:09:06of the earth.
1:09:09Dapat capital yung earth kasi place yan.
1:09:11Okay. Yung mga frozen parts of the earth
1:09:15are starting to what?
1:09:17No, they would start to melt.
1:09:22Ayan, magme-melt no? Magme-melt na. Pag
1:09:25nag-melt yan,
1:09:27yung tinatawag nating sea level. Yan.
1:09:32Yan yung sea level natin would rise
1:09:36tataas.
1:09:38Pag tumaas
1:09:40syempre isa sa mga effect niyan is
1:09:43loading.
1:09:46Okay ' ba
1:09:49ah nabalitaan niyo ba yung nangyari sa
1:09:51ano sa ano bang bansa to
1:09:55yung recent lang? Sige nga sa nanonood
1:09:58ng balita. Ayon nangyari sa Nepal ' ba
1:10:02naimagine niyo may CCTV yun ah. Napanood
1:10:04niyo yung CCTV non
1:10:08' ba? It was like
1:10:12apocalyptic event.
1:10:16Imagine mo saan ka saan ka tatakbo, saan
1:10:18ka pupunta? Kahit yung mga building
1:10:21pwedeng ma-wash out ba sa ganon kalaki
1:10:23ng water kahit magsalbabida ka hindi ka
1:10:27maisasalba non no. Ayun. So may mga
1:10:30ganong klase na ngayon ano na effect.
1:10:35Okay. Ayan. Ayan. So pinapaliwanag dito
1:10:40no. The average global temperature has
1:10:44recented. So yung pangkalahatan daw sa
1:10:46buong mundo no. Ayan 0.74 de cel.
1:10:53Ang tanong
1:10:54maliit ba yan yang 0.74? 74. Tandaan
1:10:58niyo class ang
1:11:02ice.
1:11:03Teka,
1:11:06tandaan niyo class ha. Ang ice no ay
1:11:10frozen
1:11:12by 0° celus. Pero it would turn
1:11:18it would turn liquid if it is
1:11:24okay 1
1:11:28degree celsus pataas 'di ba? Okay. So
1:11:32ibig sabihin hindi siya maliit na value
1:11:35no? Malaki yan. Bakit? Kasi kung kaya
1:11:40niya ng baguhin yung solid into liquid
1:11:44no vice versa no maapektuhan niya yung
1:11:48face nung matter sa environment
1:11:52so it would have
1:11:55no a massive effect no ganon no ayan so
1:12:01other greenhouse effect ay greenhouse
1:12:03gases methane. Ayan isa pa.
1:12:07Okay. How do greenhouse effect happen?
1:12:10No ganito yan. Instead na yung heat no,
1:12:17nag-e-escape no sa
1:12:20planet or nagco-cool down yung planet
1:12:24no.
1:12:26Okay. What happen is yung heat is being
1:12:29trapped. So bumabalik no bumabalik sa
1:12:31Earth.
1:12:33Okay. Ayan eh. Eh sir
1:12:38ano bang pwede nating gawin kung umiinit
1:12:40ang mundo 'di ba? Ba't na lang tayo
1:12:43mag-ano, magtayo ng malaking malaking
1:12:45aircon no? Kayo ba? Ano bang naiisip
1:12:48niyong paraan? [tawanan]
1:12:53Oh papaano? Papaano?
1:12:55Mag-build ng malakingmaking
1:12:57aircon. Huwag na tayong magsalita lahat
1:13:00no. Lahat tayo ano na lang ah. Oh sign.
1:13:06language yan
1:13:10na lang yan na lang
1:13:14huwag na tayong magsalita sign language
1:13:16na lang no o kaya ano text na lang no
1:13:19text ayan
1:13:24grabe no manonood ka ng pelikula walang
1:13:27ano walang tawag dito walang audio
1:13:31kasi bawal na eh no
1:13:35O, lockdown ulit.
1:13:38Mmm, pwede rin no
1:13:45lockdown ulit pwede rin para ano, huwag
1:13:48na tayong magtrabaho para [tawanan]
1:13:51wala ng gagamit ng sasakyan no. Wala ng
1:13:55magbabyahe.
1:13:58Okay. Ano? Ayun.
1:14:02Ayan. So yan iyung ano yan iyung mga ano
1:14:04greenhouse gases, greenhouse effect no
1:14:08chemical equation. Ito 'yung mga ano
1:14:10natin uh learning objectives 'no na
1:14:12nagawa natin today. Yan.
1:14:15CL do you have question so far? May
1:14:17tanong ba kayo? Yan tapos

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